Safety-valve



' (NOM0de1.)

H. G. ASHTON.

v SAFETY VALVE. v No. 291,126. Patented Jan. 1, 1884.

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YUNITED STATES PATENT OFFICE,

HENRY G. ASHTON, OF SOMERVILLE, MASSACHUSETTS.

SAF ETY-VA LV E.

SPECIFICATION forming part of Letters Patent No. 291,126, dated January 1, 1884.

Application filed September 10, 1880. (No model.) Patented in England September 22, 1880, No. 3,840; in Belgium September 2'7, 1880, No. 52,656 in Canada September 29, 1580, No. 11,783; in France September 20, 1880, No. 138,807, and in Germany October 3,

To all whom it may concern:

Be it known that I, HENRY G. ASHTON, of Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Safety -Valves, of which the following is a specification, reference being had to the accompanying drawings, in which Figure 1 is a central longitudinal section, Fig. 2 a top, and Fig. 3 a bottom view, of a valve embodying my invention.

In Letters Patent No. 122,756, dated January 16. 187 2, to William Camerer, a safety-valve is described which has in substance the parts lettered A, B, D, G, and a in my drawings, and consequently these parts are not here fully described,'my present invention consisting in the combination of the ring f, or alike projection from the valve G, with a shell, the upper part of which forms a Springcasing', and the lower part of which forms, in connection with ring f, the chamber a", and not in any peculiar conthe adjustingscrew of spring D, and also serves, with ringf, as a casing for springlD, and the point.

. the steam which escapes past the valve enters this chamber a and escapes from it through one or more holes, a, into the atmosphere; or a single escape-pipe may be used when the waste steam is to be carried to any desired The ring f 011 valve G prevents all but a small part of the waste steam from passing into that part of shell A above the ring f, this being desirable in all cases, and essential when the steam is not allowed to escape freely from the chamber a of shell A.

I do not claim anything described in the patent above named; but

What I do claim as my invention is-.

The combination of shell A, bushing B, and

valve G, with. the ring f, the upper part of 5 shell A serving, in connection with ring f, to

form a casing for the spring D, and the lower part of shell A forming, in connection with ring f, the chamber (f, as and for the purpose specified.

Y HENRY G. ASHTON. WVitnesses:

lVM. ZITTEL, JOHN R. SNow. 

